کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
147255 456388 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Quantum dot sensitized titania for photo-fuel-cell and for water splitting operation in the presence of sacrificial agents
ترجمه فارسی عنوان
تیتانیوم نقطه کوانتومی برای سلول سوختی عکس و عملیات تقسیم آب در حضور عوامل قربانی است
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی


• Photoelectrochemical cells producing hydrogen or electricity.
• Quantum dot sensitized photoanodes.
• Photo-fuel-cell operation for the production of electricity.
• Water-splitting operation for the production of hydrogen.
• Protocol of applicable quantum dot sensitizers.

Photoelectrochemical cells have been constructed using quantum dot sensitized nanocrystalline titania photoanodes and were operated under photo-fuel-cell operation to produce electricity or water-splitting operation to produce hydrogen. In the first case, the cell functioned in the presence of an alkaline electrolyte using ethanol as fuel. The obtained data allowed to define the optimal thickness of the titania film, which was approximately 15 μm. Functional sensitizers were CdS or ZnSe combined with CdS. Small band gap quantum dot sensitizers like CdSe and PbS were not functional in photo-fuel-cells, owing to the limited oxidative power of their valence-band holes. For water-splitting operation, we mainly used a S2−/SO32− electrolyte. In that case, panchromatic sensitization is possible. Thus the photoanode, which gave the highest hydrogen production rate, was constructed by combining TiO2/FTO with ZnS/CdSe/CdS quantum dots. Hydrogen was produced by applying an external bias of 0.5 V. In the absence of bias the quantity of hydrogen was very small. Hydrogen production rate was also very small in a purely alkaline environment with ethanol as fuel.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Journal - Volume 254, 15 October 2014, Pages 245–251
نویسندگان
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